Redbull87

iTrader: (3)

I got a very budget build and over winter I want to get more power out of my summer daily driver.My lq4 is in great shape and low milage stock with ls6 intake,228r cam 112lsa,truck maf,all else stock.Dyno numbers in sig.

Im picking up 243 heads to raise compression and getting longtube headers and make a custom y pipe,maybe new ls7 lifters/trays.My question is about the heads,Ill be reusing the rockers/springs/valves from my 317 heads with the pac springs.Can I reuse the tsp 7.4 hardened pushrods aswell?What head gasket is recommended and if I decide to mill the heads(.030) and do some porting will I need new pushrods again?I want to reuse what i have since I only put 100km on it this year since being installed.Im not looking to make a ton of power..just crack the 400rwhp mark and have a snappy response.

Any advice is welcome.

Tainted

iTrader: (9)

Pushrods will change when you swap heads, mill, and run a different gasket. I would measure your ptv clearance and mill accordingly.

Redbull87

iTrader: (3)

If I dont mill the heads,just have them ported,run a stock gasket then Id be able to run the same rods correct?

TiGer85SS

No I don't think so because the 317 heads are 71cc and the 243 heads are 64cc.

Grr

iTrader: (2)

^lol, if you dont know then STFU

heads all have the same rocker pad height when stock. If you dont mill and go to a thinner gasket, you will still be fine. If you mill you will need to get a shorter pushrod

Redbull87

iTrader: (3)

Thats what I thought..317/243 heads all else being the same except chamber size.If I dont mill the heads the I can literally reuse everything from my 317 heads,and replace the gaskets with new gm gaskets for the 6.0

How much gain can I realistically expect from just the stock 243 and 1 3/4 lts? Im expecting a healthy 30-40whp

Tainted

iTrader: (9)

Yea you might get that, but you realllly though consider milling or a thinner gasket. Compression is power and easy to do at this point!

Redbull87

iTrader: (3)

I understand the more compression the better,not looking for high hp.Just a slight bump up without sacrificing the stuff I just bought this year lol.

1nasty86

iTrader: (63)

id mill them .020..... i have LOTS of friends running a .020 milled 243 head on ls1 cars with no problems.. ls7 lifters and 7.400 pushrods

bww3588

iTrader: (49)

Pushrods are cheap. Mill the heads, measure for pushrod length and run a .040 gasket and enjoy. Don't run anything less than a .040 gasket or you will run your quench too tight.

Redbull87

iTrader: (3)

Ideally if I do mill them I think .030 would be a good bump up for the lq4 and the 228r cam.Plus longtubes should really help the motor in throttle response and bottom/mid range power.

IllusionalTA

iTrader: (9)

no truer truth..

02_Orange_D1SC

iTrader: (27)

im running 243s milled .030 on my LQ4 with stock .051 MLS head gaskets and im at 10.8.1 compression with a 226/230 600/600 111+3 cam

Redbull87

iTrader: (3)

sounds like a nice setup,how do you like it? Do you mind me asking what power it put down and since you milled .030 and using stock gasket..what pushrod length did you need?

02_Orange_D1SC

iTrader: (27)

truck put down 390rwhp 375rwtq on a mustang dyno threw a auto runs awsome im very happy with it also advanced inductions ported my heads i just did a TBSS intake manifold swap so it should be well in the 4xx range. im not sure what length the pushrods are since advanced inductions setup the whole package

BudRacing

iTrader: (3)

If you're looking to crack the 400rwhp mark, that combo should do it whether you mill the heads or not. Your combo will be about as close as you can get to an iron block LS2.

Redbull87

iTrader: (3)

It should be on the button 400rwhp.Right now having my stock manifolds and having clogged cats mixed with a poor tune has me leaving alot on the table.Headers with 3inch y pipe to my 3inch catback,243 heads with slight port work/milled,build a true cold air intake,might need new injectors and might port the throttle body should get me there after a new tune.If I hit 399.9rwhp Id be pissed to be that close lol

1nasty86

iTrader: (63)

I'd still use that 228r cam, mill the 243's and get a fast......no problems hitting 400+ and I'm pretty sure it will make closer to 420... if ur gonna have it returned might as well do all ur mods at once and be done with it

Redbull87

iTrader: (3)

Fast intake just isnt in the budget..nor do I think I need it for my goal.If I tear the motor down again after doing 243 heads and lt headers..it will be for an ls3/l92 topend overhaul and a bigger cam n/a..aiming over 450rwhp.Im far from that though.

BudRacing

iTrader: (3)

You shouldn't have a problem making your power goals with the LS6 intake.